四川省凉山州北部栽培苦荞麦的遗传多样性研究

用等位酶电泳技术测定了四川省凉山彝族自治州北部越西和甘洛２县的苦荞麦「Ｆａｇｏｐｙｒｕｍ ｔａｔａｑｒｉｃｕｍ（Ｌ．）Ｇａｅｒｔｎ．」１７个栽培居群的遗传多样性和分化，结合农业生物学性状进行了分析。对７个酶系统的１５个位点的检测表明，苦荞麦居群内的遗传多样性水平高于该州南部的苦荞麦和其他地区甜荞麦，每个位点的等位基因平均数为１．９，多态位点比率为５２．１％，平均实际杂合度和预期杂合度分别为０．１９

Genetic Diversity of Fagoyrum tataricum Cultivated in North Liangshan Prefecture of Yi Nationality, Sichuan, China

In the present paper is stated the accomplishment of the studies of 17 populations of cultivated Fagopyrum tataricum (L.) Gaertn. from the counties of Yuexiand Ganluo in North Liangshan Autonomous Prefecture of Yi Nationality, Sichuan Province, China by means of strarch gel electrophoresis and cluster analysis of agrobiology features. Seven enzymes, and 15 loci were assessed. The result shows that the genetic diversity of F. tataricum within population is higher than in the South Prefecture and in species F. esculentum from other areas. The A, P, Ho and He are 1.9, 52.1%, 0.190 and 0.262 respectively. The FST is 0.199 which is close to the average level of wild plants. A conservation strategy of the genetic resource of F. tataricum is suggested. Two populations of local variety “Youchiqiao” have the richest genetic diversity, P＝60.0%, Ho＝0.260 and 0.301 and they should be protected particularly. Two populations of local variety“Xiaomiqiao” with higher genetic diversity,as well as three populations of local varieties of “Qiukuqiao”, “Equkuqiao” and “Geluokuqiao” with special genetic position should be protected too.